High Idle due to Hondata's terrible soldering job!

[cloneufc]

I bought my Kpro V3 way back in 2012. The moment I got my Kpro back from Hondata, the ecu would glitch and have a steady high idle and not go past 4k RPMS. After the first day the the high idle remained but only did it under load. The car has been smoked tested for vacuum leaks, and TPS, map sensor, ELD, and IACV have all been changed out with OEM factory parts to no avail. The only thing I didn't change was the ECU. I finally got my hands on a buddy's Kpro V3, uploaded my CAL and low and behold, no more high idle under load. The problem that has been plaguing me all these years is a shoddy soldering job by Hondata. Upon inspection, I found solder drips inside the ECU, which I cleaned out and luckily landed in spots that didn't affect the board. However, they managed to do a sloppy soldering job and solder two connections that were not supposed to be soldered together. My friends Kpro, the three solder joints are free, but mine were accidentally soldered together. This problem has cost me a lot of time and money.
Attached are pictures of the problem.

https://freeimage.host/i/Jr8ogiG

[cloneufc]

I will try to clarify a little better. When I first got the Kpro, it would idle at 3k right off the bat. After about a day the idle went back to normal and I could rev past 4k, but sometimes it would glitch and act up and go into limp mode. On the second day for no reason the car acted completely normal except for the high idle after full throttle or underload, it has been stuck this way ever since. To fix the idle I would have to turn the car off and restart the engine. I've had three different engines in the car since and the same problem persists.

On my friend's Kpro V3 the 471 SMD resistor is in place, but the three connections to the left of it are free with no solder. I'm confused because I've seen pictures online where there is no resistor at all. Is this an error? It looks like someone went crazy and partially dislodged the 103 resistor above it and soldered the two connections to the left. I realize the brown stuff is just old flux. Does anyone have a picture of their V3 board?

[Hondata]

Can you provide the ECU serial number, if possible the purchase date and the KPro serial number? We'd like to follow this up.

[cloneufc]

I can't find the receipt, I only found the order form and it was dated Nov 2011.




ECU: 37820-PRB-A05
Kpro: 10243

[cloneufc]

I looked through as many pictures as I could find online of the PRB with the Kpro V3 and most do not have a resistor or jumper. I did however find one. It leaves me confused. The resistor mod is 100% from Hondata and is not in the OEM ECU's. Why would most not have a resistor and only a few have some?

Here is the only Kpro V3 I could find online with the resistor.




picupload
A bad closeup but it is the best I could find.


No jumper like all the rest I found.

[Hondata]

Those pads should be bridged by solder as part of the standard KPro installation.

[cloneufc]

Then why do some PRB Kpro V3's have it and others do not? My friend's Kpro does not have it and most others don't either. I have only found one picture online with the resistor and pads jumped. Most do not. It will help me narrow down if the high idle is a bad ECU or bad Kpro.


I want to upgrade to Kpro V4, but not if the ECU is bad. This Kpro has never acted right from the start.


You can clearly see from this image that this PRB V3 has no resistor and no pads jumped. How do you explain random differences?

[Spunkster]

It may not have been installed by Hondata.

This modification will not affect idle in any way or alter how it runs the engine.